Power 6KVA / 4200W Voltage range 176 ±5VAC~276 ±5VAC Frequency 46~54Hz ±0.5Hz, or 56~64Hz ±0.5Hz auto sensing Input phase Single phase Power factor ?0.98 Voltage range 220VAC ±1% Output phase Single phase Frequency 50Hz ±0.2% (battery mode) THD < 2% (Linear load); < 6% (non-Linear load) Overload 105%~130% 10min turn to Bypass mode, > 130% 1s turn to Bypass mode Crest factor 3:1 (max) Waveform Pure sine wave